We have learned (from chapter 9 in our textbook) that economic growth is largely dependent on productivity. Interestingly, when we line up all the countries of the world, the ones with cooler, or moderate climates grow faster than hot ones (the exception being the middle east - but that grow is due exclusively to oil). Does this mean populations in hot areas of the world are less productive? If so, why? And, what does that say about people in the U.S. that live in, say, Phoenix as opposed to those that live in Minnesota? Also, what does this correlation between temperature and economic growth mean when we are potentially faced with global warming? This is NOT a discussion on if global warming is real, or not. The question is, if it happens what impact(s) would it potentially have on world economic growth.